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    Question

    Dev borrowed Rs. 6400 at R% S.I. and Rs. 5600 at (R +

    5)% S.I. for 3 years. If the total interest came to Rs. 4800, find the rate applicable on Rs. 5600.
    A 20% Correct Answer Incorrect Answer
    B 18% Correct Answer Incorrect Answer
    C 16% Correct Answer Incorrect Answer
    D 32% Correct Answer Incorrect Answer

    Solution

    According to question, 6400 ├Ч R/100 ├Ч 3 + 5600 ├Ч (R + 5)/100 ├Ч 3 = 4800 192R + 168R + 168 ├Ч 5 = 4800 360R + 840 = 4800 360R = 3960 R = 11% So, R + 5 = 16%

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